Claude Code v2.1.63: HTTP Hooks, /simplify & /batch Slash Commands, and 10+ Memory Leak Fixes
If you run Claude Code in production, v2.1.63 is not a routine patch. This release ships a meaningful architectural shift — HTTP hooks — alongside two genuinely useful slash commands and a pile of memory leak fixes that explain why long-running Claude Code sessions sometimes go sideways. The Big One: HTTP Hooks Replace Shell-Based Hooks Previous versions of Claude Code let you hook into the agent lifecycle via shell commands. It worked, but it was clunky: you were spawning subprocesses, dealing with shell escaping, and losing type safety the moment data crossed the boundary. ...